<template>
	<div>     
	 <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
              <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
              <el-breadcrumb-item>商品管理</el-breadcrumb-item>
             <el-breadcrumb-item>参数列表</el-breadcrumb-item>
        </el-breadcrumb>
		
		 <!-- 卡片视图区域 -->
		<el-card>
			<!--警告区域-->
			  <el-alert title="注意:只允许为第三级分类设置相关参数" type="warning" show-icon :closable="false"></el-alert>
		<!--选择商品分类区域-->
		<el-row class="cat_opt">
			<el-col>
				<span>选择商品分类</span>
				<!--商品分类的级联选择框 -->
				<el-cascader
				    v-model="selectedCateKeys"
				    :options="catelist"
				    :props="cascderProps"
				    @change="handleChange">
					</el-cascader>
			</el-col>
		</el-row>
		<!--tab标签页面-->
		<el-tabs v-model="activeName" @tab-click="handleClick">
		    <el-tab-pane label="动态参数" name="many">
				<el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加参数</el-button>
				<!--动态参数表格-->
				<el-table :data="manyTableData" border stripe>
					<!--展开行-->
					<el-table-column type="expand">
						<template slot-scope="scope">
							<!--循环渲染tag标签-->
							<el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">
								{{item}}
							</el-tag>
							<!--输入框-->
							<el-input
							  class="input-new-tag"
							  v-if="scope.row.inputVisible"
							  v-model="scope.row.inputValue"
							  ref="saveTagInput"
							  size="small"
							  @keyup.enter.native="handleInputConfirm(scope.row)"
							  @blur="handleInputConfirm(scope.row)"
							>
							</el-input>
							<!--添加按钮-->
							<el-button v-else  size="small" @click="showInput(scope.row)">+ New Tag</el-button>
						</template>
					</el-table-column>
					<el-table-column label="参数名称" prop="attr_name"></el-table-column>
					<el-table-column label="操作">
						<template slot-scope="scope">
							<el-button size="mini" type="primary" icon="el-icon-edit" @click="showEditDialog(scope.row.attr_id)">编辑</el-button>
							<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
						</template>
					</el-table-column>
				</el-table>
				</el-tab-pane>
		    <el-tab-pane label="静态属性" name="only">
				<el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible = true">添加属性</el-button>
			<!--静态参数表格-->
			<el-table :data="onlyTableData" border stripe>
				<!--展开行-->
				<el-table-column type="expand">
						<template slot-scope="scope">
							<!--循环渲染tag标签-->
							<el-tag v-for="(item, i) in scope.row.attr_vals" :key="i" closable @close="handleClose(i, scope.row)">
								{{item}}
							</el-tag>
							<!--输入框-->
							<el-input
							  class="input-new-tag"
							  v-if="scope.row.inputVisible"
							  v-model="scope.row.inputValue"
							  ref="saveTagInput"
							  size="small"
							  @keyup.enter.native="handleInputConfirm(scope.row)"
							  @blur="handleInputConfirm(scope.row)"
							>
							</el-input>
							<!--添加按钮-->
							<el-button v-else  size="small" @click="showInput(scope.row)">+ New Tag</el-button>
						</template>
				</el-table-column>
				<el-table-column label="参数名称" prop="attr_name"></el-table-column>
				<el-table-column label="操作">
					<template slot-scope="scope">
						<el-button size="mini" type="primary" icon="el-icon-edit"  @click="addDialogVisible = true">编辑</el-button>
						<el-button size="mini" type="danger" icon="el-icon-delete" @click="removeParams(scope.row.attr_id)">删除</el-button>
					</template>
				</el-table-column>
			</el-table>
			</el-tab-pane>
		  </el-tabs>
		</el-card>	
		<!--添加参数对话框-->
		<el-dialog
		  :title="'添加' + this.titleText"
		  :visible.sync="addDialogVisible"
		  width="50%" @close="addDialogClosed">
		  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" class="demo-ruleForm">
		    <el-form-item :label="this.titleText" prop="attr_name">
		      <el-input v-model="addForm.attr_name"></el-input>
		    </el-form-item>
			</el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="addDialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="addParams">确 定</el-button>
		  </span>
		</el-dialog>
		<!--修改对话框-->
		<el-dialog
		  :title="'修改'+this.titleText"
		  :visible.sync="editdialogVisible"
		  width="50%" @close="editDialogClosed">
		  <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="100px" class="demo-ruleForm">
		    <el-form-item label="活动名称" prop="attr_name">
		      <el-input v-model="editForm.attr_name"></el-input>
		    </el-form-item>
			</el-form>
		  <span slot="footer" class="dialog-footer">
		    <el-button @click="editdialogVisible = false">取 消</el-button>
		    <el-button type="primary" @click="editParams">确 定</el-button>
		  </span>
		</el-dialog>

		</div>
</template>

<script>
	export default{
		data() {
			return{
				//商品分类列表
				catelist: [],
				//级联选择框双向数据绑定到的数组
				selectedCateKeys: [],
				//级联选择框的配置对象
				cascderProps:{
					expandTrigger: 'hover',
					value: 'cat_id',
					label: 'cat_name',
					children: 'children'
				},
				//默认选择项
				activeName: 'many',
				//动态参数
				manyTableData: [],
				//静态参数
				onlyTableData: [],
				//控制添加参数对话框的显示与隐藏
				addDialogVisible: false,
				addForm: {
					attr_name: ''
				},
				addFormRules: {
					 attr_name: [
						 {required: true, message:'请输入分类名称',trigger:'blur'}
					 ] 
				},
				//控制修改参数对话框的显示与隐藏
				editdialogVisible: false,
				editForm: {},
				editFormRules:{
						 attr_name: [
							 {required: true, message:'请输入分类名称',trigger:'blur'}
						 ] 
					
				}
			}
		},
		created(){
			this.getCateList()
		},
		methods:{
			//获取商品分类列表数据
			async getCateList(){
				const { data:res } = await this.$http.get('categories')
				if(res.meta.status!==200){
					return this.$message.error('获取商品分类列表失败')
				}
				//console.log(res.data)
				this.catelist=res.data
			},
			//级联框发生变化
			async handleChange(){
				this.getParamsData()
		},
		//tab页签点击变化时触发
		handleClick(){
			console.log(this.activeName)
			this.getParamsData()
		},
		//获取参数列表
		async getParamsData(){
			//证明选中的不是三级分类
			if(this.selectedCateKeys.length !== 3){
				this.selectedCateKeys=[]
				this.manyTableData= []
				this.onlyTableData=[]
				return {}
			}
			console.log(this.selectedCateKeys)
			const { data:res } = await this.$http.get(`categories/${ this.createId }/attributes`, { params: {sel: this.activeName}})
			if(res.meta.status!==200){
				return this.$message.error('获取参数列表失败')
			}
			//console.log(res.data)
			
			res.data.forEach(item =>{
				item.attr_vals=item.attr_vals ? item.attr_vals.split(' '): [],
				//切换添加按钮和输入框显示
				item.inputVisible=false
				item.inputValue=''
			})
			console.log(res.data)
			//证明获取的是动态参数数据
			if(this.activeName === 'many'){
				this.manyTableData=res.data
			}
			this.onlyTableData=res.data
		},
		//监听对话框的关闭事件
		addDialogClosed(){
			this.$refs.addFormRef.resetFields()
		},
		//点击确定添加参数
		addParams(){
			this.$refs.addFormRef.validate(async valid => {
				if(!valid) return{}
				const { data:res } = await	this.$http.post(`categories/${ this.createId }/attributes`, 
				{
					attr_name: this.addForm.attr_name,
					attr_sel: this.activeName
				})
				if(res.meta.status!==201){
					return this.$message.error('添加参数失败')
				}
				this.$message.success('添加成功')
				this.getParamsData()
				this.addDialogVisible =false
			})
		},
		//修改参数信息
		async showEditDialog(attrId){
			const { data:res } = await this.$http.get(`categories/${this.createId}/attributes/${attrId}`,{ params:{ attr_sel:this.activeName } })
			if(res.meta.status!==200){
				return this.$message.error('获取参数信息失败')
			}
			this.editForm =res.data
			this.editdialogVisible=true
		},
		editDialogClosed(){
			this.$refs.editFormRef.resetFields()
		},
		//点击修改按钮参数
		 editParams(){
			this.$refs.editFormRef.validate(async valid => {
				if(!valid)return{}
				const { data:res } = await this.$http.put(`categories/${this.createId}/attributes/${this.editForm.attr_id}`, {attr_name:this.editForm.attr_name,attr_sel:this.activeName})
			if(res.meta.status !== 200){
				return this.$message.error('修改参数失败')
			}
			this.$message.success('修改参数成功')
			this.getParamsData()
			this.editdialogVisible=false
			})
		},
		//点击删除参数
		async removeParams(attrId){
			const confirmResult = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
			          confirmButtonText: '确定',
			          cancelButtonText: '取消',
			          type: 'warning'
			        }).catch(err => err)
					//console.log(confirmResult)
					if(confirmResult !== 'confirm'){
						return this.$message.info('您取消本次删除操作')
					}
					//发起请求删除参数
					const { data: res } = await this.$http.delete(`categories/${this.createId}/attributes/${attrId}`)	
					if(res.meta.status !== 200){
						return this.$message.error('删除参数失败')
					}
					this.$message.success('删除参数成功')
					this.getParamsData()
		},
		async handleInputConfirm (row) {
			//console.log('ok')
			//对输入框做非空校验
			if(row.inputValue.trim().length === 0){
				row.inputValue=''
				row.inputVisible=false
				return {}
			}
			//如果没有return 就应该进行添加操作
			row.attr_vals.push(row.inputValue.trim())
			row.inputValue=''
			row.inputVisible=false
			this.saveAttrVales(row)
		},
		showInput(row){
			row.inputVisible=true
			//让输入框自动获得焦点
			  this.$nextTick(_ => {
			          this.$refs.saveTagInput.$refs.input.focus();
			        });
		},
		async saveAttrVales (row) {
			const { data: res } = await this.$http.put(`categories/${this.createId}/attributes/${row.attr_id}`,{
				attr_name: row.attr_name,
				attr_sel: this.activeName,
				attr_vals: row.attr_vals.join()
			})
			if(res.meta.status !== 200){
				return this.$message.error('更新参数项失败')
			}
			this.$message.success('更新参数项成功')
		},
		//监听tag标签删除事件
		handleClose(i,row){
			row.attr_vals.splice(i, 1)
			this.saveAttrVales(row)
		}
		},
		computed:{
			isBtnDisabled(){
				if(this.selectedCateKeys.length !==3){
					return true
				}
				return false
			},
			//获取三级分类id
			createId() {
				if(this.selectedCateKeys.length === 3){
					return this.selectedCateKeys[2]
				}
				return null
			},
			//动态计算添加对话框文本
			titleText (){
				if(this.activeName === 'many'){
					return '动态参数'
				}
				return '静态属性'
			}
		}
	}
</script>

<style lang="less" scoped>
	.cat_opt{
		margin: 15px 0;
	}
	.el-tag{
		margin: 10px;
	}
	.input-new-tag{
		width: 150px;
	}
</style>
